Trouble with reintegrating hen

I have a sizzle who sat broody for a little over a month. She hatched out one chick, but abandoned it. We put her in the broody breaker inside the flock's safe run area (where we lock them in when we can't be out with them- hawks are a big issue here) and let her have a week or so to feed and drink and readjust to being around the "big girls".

She has always been lowest in the pecking order, but now the other girls are just being super bad about picking at her and chasing her. She spent an hour this morning just hiding in the coop, not coming out, for fear the big hens will chase her. I have seen that she's trying to get re established. She keeps challenging the other Silkie girl, but when she does, one of the GLWs rushes in and plucks feathers from her neck. I've seen her get hassled by all of our BO's, our GLWs, and the Silkie. The EEs seem to be indifferent; she sometimes takes refuge behind the EE who is at the top of the pecking order(???) and that hen will just leave her be. Right now, they're wandering around the backyard, and the Sizzle is about 20 yards away from the nearest hen--very far from the flock.

So, should I just let them do their thing? Should I separate the GLW, since she seems to be the worst "bully" right now? Should I put the Sizzle back in the broody breaker in the run for a few more days?

Put her back in the box, I personally will let them out every day to see how it goes, than return them back to the pen when things get rough, it can take a while to integrate them back into the flock, depending on the circumstances. If it was a normal sized hen I might let them work it out. Mixing bantam and especially silkies with bigger more pushy breeds like Wyandotte is always iffy. So keep her separated unless you can watch, until you feel like the bad attacks are done. Crested breeds can often be pecked on the crests by other breeds. I personally keep my bantam separate from large breeds, especially odd acting, continuously broody silkies.

I'm not sure where to put this, but I have a hen that just showed up and just hangs out in the yard. She went missing and we thought something got her, and we ended up getting some chickens after that. We have two coops and a fenced area for them. She showed back up with two chicks and was sleeping in a bush. Last week one of the chicks disappeared and she won't go near the bush anymore so I'm fairly certain a preditor got it. But now she's sleeping in a tree with the chick. She can fly really well. Cannot get near her or the chick. She hangs around the pen with the other chickens during the day and I've put different nesting boxes out and various other things trying to get her to sleep there but no such luck. Right now it's storming and she's in the tree with the chick near the dogs. Worried sick over it.